Determine the mass in grams of 2.71 x 10^21 atoms of arsenic if the mass of one mole is 74.92g

0.337 g As

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 2.71 × 10²¹ atoms As

[Solve] grams As

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of As - 74.92 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.337152 g As ≈ 0.337 g As

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